Foundations of Math Functions Review

Which set of values is a function?

• (9,5) (10,5) (9,-5) (10,-5)

• (3,4) (4,-3) (7,4) (3, 8)

• (6,-5) (7, -3) (8, -1) (9, 1)

• (2, -2) (5, 9) (5, -7) (1, 4)

Is this table a function or not a function? 

• Function

• Not a Function

For the function f(x) = -3x + 3 find f(0).

• 0

• -3

• 3

• -1

For the function {(0,1), (1,-3), (2,-4), (-4,1)}, write the domain and range.

• D: {1, -3, -4,}
  R: {0, 1, 2, -4}

• D: {-4, 0, 1, 2}
  R:{-4, -3, 1}

• D: {0, 1, 2, 3, 4}
  R:{1, -3, -4}

• D: {0, 1, 2, -4}
  R: {1, -3, -4, 1}

Evaluate the function for the given value:

• -11

• -17

• -13

• -21

What is the solution to the system?

y = 2x + 1

y = 4x - 1

• (1,3)

• (-1,-3)

• (-1,3)

• (3,1)

Will the solution (-3, -7) make the following system of equations a true statement? 
y = 4x + 5
y = x – 4

• YES

• NO

What is the solution to this system?

y= 4x + 3

2x - 3y = 21

• (3,-9)

• (-3,-9)

• (-3,9)

• (0,1)

Solve:
y = 7x + 9
2y + 2x = -18

• (5, 0)

• (9, 18)

• (-2, -5)

• (1, 16)

Ruby won a bag full of money!! She has 49 bills in all. She counts a total of $1430 in the bag. There are twenty dollar bills and fifty dollar bills only. Which system best represents this situation?

• x + y = 1430 and 10x + 39y = 49

• x + y = 49 and 20x + 50y = 1430

• x + y = 49 and 10x + 39y = 1430

• x + y = 1430 and 20x + 50y = 49